Chain saw unit



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CHAIN SAW UNIT Original Filed Nov. l5, 1933 5 Sheets-Sheet 1 IN VEN TOR.

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CHAIN SAW UNIT Original Filed Nov. 15, 1935 3 Sheets-Sheet 2 HVVENTUR.

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CHAIN vsAw UNIT Original Filed Nov. 15, 1933 3 Sheets-Sheet 3 O O OOO@ O OOO O o o In' C)o oO O 000080 Q O O O o INVENTOR. l

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Patented Mir. 3, 1936 CHAIN SAW UNIT George Arsneau, mesne assignments,

Los Angeles, Calif., assignor, by

Dow Power Saw Com- PMU, a corporation of California original application November 15, 193,3, serial this application Jan- Ilary 30, 1934, Serial No. 708,983

1 Claim.

This application is a division of my copending application entitled Powersaws, filed Nov. 15, 1933, Ser. No. 698,186.

This invention relates to sawing machines and more particularly to a chain saw unit.

It is the object of the present'invention to provide a chain saw unit for use in sawing machines of the general character described in my copending application above referred to that is simple and rugged in construction; that will be effectively lubricated by a novel built-in lubricating system; that will include safety means for protection of the operator and means for adjusting the tension on the chain saw.

One form which the invention may assume is exemplified in the following description and illus-y trated by way of example in the accompanying drawings, in which:

Fig. 1 is a section taken on a horizontal plane through the chain saw unit.

Fig. 2 is a view partly in vertical section and partly in elevation of certain of the parts shown in Fig. 1.

Fig. 3 is a side view in elevation of a complete sawing machine with parts broken away and parts in section.

Fig. 4 is a fragmentary view in elevation on an sliding means I3a carries a iixed lug I3b in which a screw II is mounted so as to engage at one of its ends against an adjacent wall of the gear housing. Passing through the plate I2 and 10 mounted to move with the means I3 are clamping enlarged scale with parts in section illustrating the manner of mounting the unit to the housing by means of which it is supported.

Referring more particularly to the drawings, the chain saw unit comprises a rigid frame structure which includes companion plates 'I-1 having interposed therebetween ller plates Ia- 1a and a longitudinal wick 8, such as a strip of felt or like porous material, the plates 1-1 and 'Ia- 1a being riveted together at 9 or otherwise connected with each other in a suitable well-known manner. This construction is such that a lubricant holder is formed between said plates for the retention of lubricant. For this reason, the plates are formed with supply perforations 8a into which the nozzle of a lubricant container or force feed gun (not shown) may be introduced and lubricant supplied to the Wick to a point of oversaturation thereof, whereby there will exist a tendency of the lubricant to seek egress towards the vopen side of the saw-carrying frame. Now, it will be observed that the chain saw has its sprocket teeth I0 and Illa disposed to operate in the space between said plates 1-1 as the saw operates over a regularly defined course and in so doing, lubricant will be collected thereby. It is thus proposed that the cutting edge o; the saw bolts I8, the latter passing through the longitudinal guide slots I9 in the extension I4 of the housing plate I5. It follows that when the bolts I8 are loosened, movement in a longitudinal direction can be imparted to the frame of the saw assembly. The structural features just referred to largely make up the saw tensioning means. The saw is trained over an idler 20 at the front of the frame of the saw assembly and over a sprocket gear 2| on a driven spindle 22, the latter passing through a longitudinal slot IIa in the plate II and journaled in a bearing 23 carried by the housing head I5 and in a similar bearing (not shown) carried by the opposite head 25 of said housing. Because of this manner of mounting the spindle 22, it will be appreciated that when longitudinal movement is imparted to the frame structure of the saw assembly, the idler 20 will move relatively to the sprocket gear ZI, whereby to enable the chain saw to be readily tensioned when the exigency therefor arises.

At the front or operators end of the saw assembly is a hand and body guard 'I9 which constitutes a part of the saw-carrying frame of said assembly, and same passes over the saw to approximately the extent illustrated clearly in Figure 2 and with ample clearance between the inner walls of said guard and the cutting edge of the saw. A tubular member 80 at said operators end of the saw frame accommodates a hand grip 8| in the form of a transverse bar, it being intended that it be used when moving the saw frame on its fulcrum, as well as when (1) angularly adjusting the frame to assume a predetermined position, or (2) when transporting the machine from one place to another or when adjusting the machine to the work. A guard member 82 is supported by the frame of the saw assembly and same occupies a position to protect one against injury by contact with the cutting edge of the saw. It is thus manifest that all of the saw except the part thereof which of necessity must be exposed forv duty is concealed in a manner that will reduce the possibility of injury to the person of the operator or persons standing in close proximity to the saw to a, reasonab minimum.

Having thus described my invention. what I claim and desire to secure by Letters Patent is: In a sawing machine, a frame, an idler at one end of the trame. a gear housing. a cover plate on said housing having an' extension formed thereon, a sliding connection between the other lo end of said trame and said extension, a driven shaft extending through said cover plate, a

sprocket gear secured to the outer end o! said shaft, a chain saw trained over'the idler and over said sprocket gear. an adjusting screw carried by the frame adjacent said sliding connection and bearing against the gear housing to move the frame and vary thetension yon the saw, and

clamping means for retaining said sliding connection in adjusted position. 1 GEORGE ARSNEAU. 

